Boonsak Ponsana

Ponsana competed at the 2000 Summer Olympics, but was defeated in the round of 64. At the 2004 Summer Olympics, he was defeating Chris Dednam of South Africa and Lee Hyun-il of South Korea in the first two rounds. In the quarterfinals, Ponsana defeated Ronald Susilo of Singapore 15–10, 15–1. He advanced to the semifinals, in which he lost to Taufik Hidayat of Indonesia 15–9, 15–2. Playing in the bronze medal match, he again lost to an Indonesian, this time Soni Dwi Kuncoro by a score of 15–11, 17-16 for a fourth-place finish. At the 2008 Summer Olympics, he reached the second round of the men's singles, where he lost 2 – 0 to Indonesia's Sony Dwi Kuncoro.

In 2007, he won the gold medals at the Summer Universiade in the men's singles and mixed team event. He also won some international tournament in 2004 Thailand Open, 2007 Singapore Open, and in 2008 India Open. He competed in 2009 Superseries Finals but he did not qualify for the semi-finals. He played for Thailand in 2009 SEA Games in Laos, helping to win a bronze medal for Thailand in men's team. In 2012, he repeated his successful run at the Singapore Open Super Series beating Wang Zhengming of China in a thrilling two set match. Prior to his participation in the 2012 Singapore Open, injury had caused him to skip some tournaments in 2011, and his earlier 2012 results had not been especially good, although he did qualify for the Olympics again. In 2013, Boonsak has changed his speciality to men's doubles and he is now teaming with Songphon Anugritayawon.